very important for all our lives

How to search for fuel substitution / replacement in addition to crude oil / natural gas that is clearly destructive nature (both exploration and exploitation, and the effects of exhaust gas), which means destroying the lives of all living beings, including human.
How Concerns Us All to seek substitution / replacement of other energy which are environmentally friendly?
Let's Concern

If that is environmentally friendly is the reduction of toxic gases from burning fuels, the bio-fuels is likely to succeed as an environmentally friendly fuel. But judging from the other side, such as the expansion of one crop plantation for bio-fuel supply this. This is a problem in itself, considering how much of the forest / land that must be sacrificed to a plantation.
So which side of the friendly environment?

I am very concerned,
I'm doing research biogas from cattle, but also can overcome the environment-friendly livestock waste pollution. the price is cheap, easily obtained, but still a bit difficult to handle (new in the study) you wish to participate in this research? I'll wait.

Certain companies are committed in replacing oil but have not been given much support by the government. Hybrid cars are already in the market. Solar powered homes are now being built.
My question is, how committed are these companies in saving mother earth? I mean they have given so much effort in conducting studies on how to reduce our dependence to gas. They have produced their work, it is out in the market but only a few can afford it. This situation confuses me a bit. Are they helping or is their main goal really is to have more money.